A machine,
not a person, will score your SAT II Biology Test.
The tabulating machine sees only the filled-in ovals on your answer
sheet and does not care how you came to these answers; it just impassively
notes whether your answers are correct. So whether you knew the
correct answer right away or just took a lucky guess, the machine
will award you one point. It doesn’t award points if you managed
to get a tricky question right. Think of this scoring system as
a message to you from ETS: “We care only about your answers, not
any of the thought behind them.”

So you should give ETS right answers, as many
as possible, using whatever means possible. The SAT II Biology Test
not only allows you to show off your knowledge of biology, it gives you
the opportunity to show off your foxlike cunning by figuring out
what strategies will allow you to best display that knowledge.